The value of x is 2. Option 3
A linear equation is a mathematical expression that depicts a straight line when graphed. It involves variables raised to the power of 1 (no squared or higher terms)
From the information given, we have that;
x + 4/6x = 1/x
cross multiply the values
x(x + 4) = 6x
expand the bracket;
x² + 4x = 6x
collect the like terms
x² - 2x = 0
make 'x' the subject
x² = 2x
x = 2